Added parent-child relationships to regions, overhauled region code, added global build flag, improved flag support.

config.yml

@@ -70,6 +70,8 @@ player-damage:
 regions:
     enable: on
     wand: 287
+    default:
+        build: true
 
 blacklist:
     logging:

plugin.yml

@@ -23,7 +23,7 @@ commands:
         aliases: ;
     region:
         description: Adjust protected regions
-        usage: /<command> <define|claim|flag|delete|info|addowner|removeowner|list|save|load> ...
+        usage: /<command> <define|claim|setparent|flag|delete|info|addowner|removeowner|addmember|removemember|list|save|load> ...
         aliases: rg, regions
     locate:
         description: Set your compass towards a person

src/com/sk89q/worldguard/bukkit/WorldGuardBlockListener.java

@@ -168,7 +168,7 @@ public void onBlockFlow(BlockFromToEvent event) {
     public void onBlockIgnite(BlockIgniteEvent event) {
         IgniteCause cause = event.getCause();
         Block block = event.getBlock();
-        Player player = event.getPlayer();
+        //Player player = event.getPlayer();
         World world = block.getWorld();
         boolean isFireSpread = cause == IgniteCause.SLOW_SPREAD
                 || cause == IgniteCause.SPREAD;
@@ -208,22 +208,38 @@ public void onBlockIgnite(BlockIgniteEvent event) {
             }
         }
         
-        if (plugin.useRegions && player != null && !plugin.hasPermission(player, "/regionbypass")) {
+        /*if (plugin.useRegions) {
             Vector pt = toVector(block);
-            LocalPlayer localPlayer = plugin.wrapPlayer(player);
             
-            if (cause == IgniteCause.FLINT_AND_STEEL
+            if (player != null && !plugin.hasPermission(player, "/regionbypass")) {
-                    && !plugin.regionManager.getApplicableRegions(pt).canBuild(localPlayer)) {
+                LocalPlayer localPlayer = plugin.wrapPlayer(player);
+                
+                if (cause == IgniteCause.FLINT_AND_STEEL
+                        && !plugin.regionManager.getApplicableRegions(pt).canBuild(localPlayer)) {
+                    event.setCancelled(true);
+                    return;
+                }
+                
+                if (cause == IgniteCause.FLINT_AND_STEEL
+                        && !plugin.regionManager.getApplicableRegions(pt)
+                        .allowsFlag(AreaFlags.FLAG_LIGHTER)) {
+                    event.setCancelled(true);
+                    return;
+                }
+            }
+            
+            f (isFireSpread && !plugin.regionManager.getApplicableRegions(pt)
+                    .allowsFlag(AreaFlags.FLAG_FIRE_SPREAD)) {
                 event.setCancelled(true);
                 return;
             }
             
-            if (cause == IgniteCause.FLINT_AND_STEEL
+            if (cause == IgniteCause.LAVA && !plugin.regionManager.getApplicableRegions(pt)
-                    && !plugin.regionManager.getApplicableRegions(pt).allowsLighter()) {
+                    .allowsFlag(AreaFlags.FLAG_LAVA_FIRE)) {
                 event.setCancelled(true);
                 return;
             }
-        }
+        }*/
     }
 
     /**
@@ -260,7 +276,12 @@ public void onBlockInteract(BlockInteractEvent event) {
         Block block = event.getBlock();
         LivingEntity entity = event.getEntity();
         
-        if (entity instanceof Player && block.getType() == Material.CHEST) {
+        if (entity instanceof Player
+                && (block.getType() == Material.CHEST
+                        || block.getType() == Material.DISPENSER
+                        || block.getType() == Material.FURNACE
+                        || block.getType() == Material.BURNING_FURNACE
+                        || block.getType() == Material.NOTE_BLOCK)) {
             Player player = (Player)entity;
             if (plugin.useRegions) {
                 Vector pt = toVector(block);

src/com/sk89q/worldguard/bukkit/WorldGuardEntityListener.java

@@ -22,13 +22,16 @@
 import org.bukkit.ChatColor;
 import org.bukkit.Location;
 import org.bukkit.World;
+import org.bukkit.entity.Creeper;
 import org.bukkit.entity.Entity;
 import org.bukkit.entity.LivingEntity;
+import org.bukkit.entity.Monster;
 import org.bukkit.entity.Player;
 import org.bukkit.event.entity.*;
 import org.bukkit.event.entity.EntityDamageEvent.DamageCause;
 import com.sk89q.worldedit.Vector;
 import com.sk89q.worldedit.blocks.BlockType;
+import com.sk89q.worldguard.protection.AreaFlags;
 import static com.sk89q.worldguard.bukkit.BukkitUtil.*;
 
 public class WorldGuardEntityListener extends EntityListener {
@@ -78,18 +81,45 @@ public void onEntityDamageByEntity(EntityDamageByEntityEvent event) {
                 event.setCancelled(true);
                 return;
             }
-            
+
             if (attacker != null && attacker instanceof Player) {
                 if (plugin.useRegions) {
                     Vector pt = toVector(defender.getLocation());
                     
-                    if (!plugin.regionManager.getApplicableRegions(pt).allowsPvP()) {
+                    if (!plugin.regionManager.getApplicableRegions(pt)
+                            .allowsFlag(AreaFlags.FLAG_PVP)) {
                         ((Player)attacker).sendMessage(ChatColor.DARK_RED + "You are in a no-PvP area.");
                         event.setCancelled(true);
                         return;
                     }
                 }
             }
+            
+            if (attacker != null && attacker instanceof Monster) {
+                if (attacker instanceof Creeper && plugin.blockCreeperExplosions) {
+                    event.setCancelled(true);
+                    return;
+                }
+                
+                if (plugin.useRegions) {
+                    Vector pt = toVector(defender.getLocation());
+                    
+                    if (!plugin.regionManager.getApplicableRegions(pt)
+                            .allowsFlag(AreaFlags.FLAG_MOB_DAMAGE)) {
+                        event.setCancelled(true);
+                        return;
+                    }
+                    
+                    if (attacker instanceof Creeper) {
+                        if (!plugin.regionManager.getApplicableRegions(pt)
+                                .allowsFlag(AreaFlags.FLAG_CREEPER_EXPLOSION)) {
+                            event.setCancelled(true);
+                            return;
+                        }
+                    }
+                }
+                
+            }
         }
     }
     
@@ -172,10 +202,17 @@ public void onEntityExplode(EntityExplodeEvent event) {
                 return;
             }
             
+            if (!plugin.regionManager.getApplicableRegions(BukkitUtil.toVector(event.getEntity().getLocation()))
+                    .allowsFlag(AreaFlags.FLAG_CREEPER_EXPLOSION)) {
+                event.setCancelled(true);
+                return;
+            }
+            
             if (plugin.useRegions) {
                 Vector pt = toVector(event.getEntity().getLocation());
                 
-                if (!plugin.regionManager.getApplicableRegions(pt).allowsCreeperExplosions()) {
+                if (!plugin.regionManager.getApplicableRegions(pt)
+                        .allowsFlag(AreaFlags.FLAG_CREEPER_EXPLOSION)) {
                     event.setCancelled(true);
                     return;
                 }
@@ -189,7 +226,8 @@ public void onEntityExplode(EntityExplodeEvent event) {
             if (plugin.useRegions && event.getEntity() != null) {
                 Vector pt = toVector(event.getEntity().getLocation());
                 
-                if (!plugin.regionManager.getApplicableRegions(pt).allowsTNT()) {
+                if (!plugin.regionManager.getApplicableRegions(pt)
+                        .allowsFlag(AreaFlags.FLAG_TNT)) {
                     event.setCancelled(true);
                     return;
                 }

src/com/sk89q/worldguard/bukkit/WorldGuardPlayerListener.java

@@ -27,6 +27,7 @@
 import com.sk89q.worldedit.Vector;
 import com.sk89q.worldguard.*;
 import com.sk89q.worldguard.blacklist.events.ItemUseBlacklistEvent;
+import com.sk89q.worldguard.protection.AreaFlags;
 import static com.sk89q.worldguard.bukkit.BukkitUtil.*;
 
 /**
@@ -109,7 +110,7 @@ public void onPlayerItem(PlayerItemEvent event) {
             }
         }
         
-        if (item != null && plugin.blacklist != null && block != null) {
+        if (plugin.blacklist != null && item != null && block != null) {
             if (!plugin.blacklist.check(
                     new ItemUseBlacklistEvent(plugin.wrapPlayer(player),
                             toVector(block.getRelative(event.getBlockFace())),
@@ -118,6 +119,16 @@ public void onPlayerItem(PlayerItemEvent event) {
                 return;
             }
         }
+    
+        if (plugin.useRegions && item != null && block != null && item.getTypeId() == 259) {
+            Vector pt = toVector(block.getRelative(event.getBlockFace()));
+            
+            if (!plugin.regionManager.getApplicableRegions(pt)
+                    .allowsFlag(AreaFlags.FLAG_LIGHTER)) {
+                event.setCancelled(true);
+                return;
+            }
+        }
     }
 
     /**

src/com/sk89q/worldguard/bukkit/WorldGuardPlugin.java

@@ -23,7 +23,6 @@
 import java.io.*;
 import java.util.*;
 import java.util.logging.*;
-import java.util.logging.Logger;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 import org.bukkit.command.Command;
@@ -53,6 +52,8 @@
 import com.sk89q.worldguard.blacklist.loggers.*;
 import com.sk89q.worldguard.domains.DefaultDomain;
 import com.sk89q.worldguard.protection.*;
+import com.sk89q.worldguard.protection.AreaFlags.State;
+import com.sk89q.worldguard.protection.ProtectedRegion.CircularInheritanceException;
 
 /**
  * Plugin for Bukkit.
@@ -77,7 +78,8 @@ public class WorldGuardPlugin extends JavaPlugin {
     
     Blacklist blacklist;
 
-    RegionManager regionManager = new FlatRegionManager();
+    GlobalFlags globalFlags = new GlobalFlags();
+    RegionManager regionManager = new FlatRegionManager(globalFlags);
     ProtectionDatabase regionLoader;
     
     Set<String> invinciblePlayers = new HashSet<String>();
@@ -289,9 +291,10 @@ public void loadConfiguration() {
         disableSuffocationDamage = config.getBoolean("player-damage.disable-suffocation-damage", false);
         disableContactDamage = config.getBoolean("player-damage.disable-contact-damage", false);
         teleportOnSuffocation = config.getBoolean("player-damage.teleport-on-suffocation", false);
-        
+
         useRegions = config.getBoolean("regions.enable", true);
         regionWand = config.getInt("regions.wand", 287);
+        globalFlags.canBuild = config.getBoolean("regions.default.build", true);
 
         try {
             regionLoader.load();
@@ -422,6 +425,12 @@ public boolean onCommand(Player player, Command cmd, String commandLabel, String
         } catch (InsufficientPermissionsException e) {
             player.sendMessage(ChatColor.RED + "You don't have sufficient permission.");
             return true;
+        } catch (CommandHandlingException e) {
+            return true;
+        } catch (Throwable t) {
+            player.sendMessage(ChatColor.RED + "ERROR: " + t.getMessage());
+            t.printStackTrace();
+            return true;
         }
     }
     
@@ -432,11 +441,10 @@ public boolean onCommand(Player player, Command cmd, String commandLabel, String
      * @param cmd
      * @param args
      * @return
-     * @throws InsufficientArgumentsException
+     * @throws CommandHandlingException
-     * @throws InsufficientPermissionsException
      */
     private boolean handleCommand(Player player, String cmd, String[] args)
-            throws InsufficientArgumentsException, InsufficientPermissionsException {
+            throws CommandHandlingException {
         
         if (cmd.equalsIgnoreCase("stopfire")) {
             checkPermission(player, "/stopfire");
@@ -711,11 +719,10 @@ private boolean handleCommand(Player player, String cmd, String[] args)
      * @param player
      * @param action
      * @param args
-     * @throws InsufficientPermissionsException 
+     * @throws CommandHandlingException
-     * @throws InsufficientArgumentsException 
      */
     private boolean handleRegionCommand(Player player, String action, String[] args)
-            throws InsufficientPermissionsException, InsufficientArgumentsException {
+            throws CommandHandlingException {
         if (!useRegions) {
             player.sendMessage(ChatColor.RED + "Regions are disabled.");
             return true;
@@ -743,11 +750,11 @@ private boolean handleRegionCommand(Player player, String action, String[] args)
                 BlockVector min = weRegion.getMinimumPoint().toBlockVector();
                 BlockVector max = weRegion.getMaximumPoint().toBlockVector();
                 
-                ProtectedRegion region = new ProtectedCuboidRegion(min, max);
+                ProtectedRegion region = new ProtectedCuboidRegion(id, min, max);
                 if (args.length >= 2) {
                     region.setOwners(parseDomainString(args, 1));
                 }
-                regionManager.addRegion(id, region);
+                regionManager.addRegion(region);
                 regionLoader.save(regionManager);
                 player.sendMessage(ChatColor.YELLOW + "Region saved as " + id + ".");
             } catch (IncompleteRegionException e) {
@@ -785,7 +792,7 @@ private boolean handleRegionCommand(Player player, String action, String[] args)
                 BlockVector min = weRegion.getMinimumPoint().toBlockVector();
                 BlockVector max = weRegion.getMaximumPoint().toBlockVector();
                 
-                ProtectedRegion region = new ProtectedCuboidRegion(min, max);
+                ProtectedRegion region = new ProtectedCuboidRegion(id, min, max);
                 
                 if (regionManager.overlapsUnownedRegion(region, wrapPlayer(player))) {
                     player.sendMessage(ChatColor.RED + "This region overlaps with someone else's region.");
@@ -794,7 +801,7 @@ private boolean handleRegionCommand(Player player, String action, String[] args)
                 
                 region.getOwners().addPlayer(player.getName());
                 
-                regionManager.addRegion(id, region);
+                regionManager.addRegion(region);
                 regionLoader.save(regionManager);
                 player.sendMessage(ChatColor.YELLOW + "Region saved as " + id + ".");
             } catch (IncompleteRegionException e) {
@@ -835,23 +842,78 @@ private boolean handleRegionCommand(Player player, String action, String[] args)
                     return true;
                 }
                 
-                AreaFlags flags = region.getFlags();
+                if (flagStr.length() == 0) {
-                
+                    player.sendMessage(ChatColor.RED + "A flag must be specified.");
-                if (flagStr.equalsIgnoreCase("build")) {
+                    return true;
-                    flags.allowBuild = state;
+                    // Custom flag
-                } else if (flagStr.equalsIgnoreCase("pvp")) {
+                } else if (flagStr.length() == 2 && flagStr.matches("^_[A-Za-z0-0]$")) {
-                    flags.allowPvP = state;
-                } else if (flagStr.equalsIgnoreCase("tnt")) {
-                    flags.allowTNT = state;
-                } else if (flagStr.equalsIgnoreCase("lighter")) {
-                    flags.allowLighter = state;
                 } else {
-                    player.sendMessage(ChatColor.RED + "Acceptable flags: build, pvp, tnt, lighter");
+                    flagStr = AreaFlags.fromAlias(flagStr);
+                    if (flagStr == null) {
+                        player.sendMessage(ChatColor.RED + "Unknown flag specified.");
+                        return true;
+                    }
+                }
+
+                AreaFlags flags = region.getFlags();
+                flags.set(flagStr, state);
+                regionLoader.save(regionManager);
+                player.sendMessage(ChatColor.YELLOW + "Region '" + id + "' updated.");
+            } catch (IOException e) {
+                player.sendMessage(ChatColor.RED + "Region database failed to save: "
+                        + e.getMessage());
+            }
+            
+            return true;
+        }
+
+        if (action.equalsIgnoreCase("setparent")) {
+            if (!hasPermission(player, "/regionclaim")) {
+                checkRegionPermission(player, "/regiondefine");
+            }
+            checkArgs(args, 1, 2, "/region setparent <id> <parent-id>");
+            
+            String id = args[0].toLowerCase();
+            String parentId = args.length > 1 ? args[1].toLowerCase() : null;
+            
+            ProtectedRegion region = regionManager.getRegion(id);
+            
+            if (region == null) {
+                player.sendMessage(ChatColor.RED + "Could not find a region with ID: " + id);
+                return true;
+            }
+            
+            if (!canUseRegionCommand(player, "/regiondefine")
+                    && !region.isOwner(wrapPlayer(player))) {
+                player.sendMessage(ChatColor.RED + "You need to own the target regions");
+                return true;
+            }
+            
+            ProtectedRegion parent = null;
+            
+            // Set a parent
+            if (parentId != null) {
+                parent = regionManager.getRegion(parentId);
+                
+                if (parent == null) {
+                    player.sendMessage(ChatColor.RED + "Could not find a region with ID: " + parentId);
                     return true;
                 }
                 
+                if (!canUseRegionCommand(player, "/regiondefine")
+                        && !parent.isOwner(wrapPlayer(player))) {
+                    player.sendMessage(ChatColor.RED + "You need to own the parent region.");
+                    return true;
+                }
+            }
+            
+            try {
+                region.setParent(parent);
+                
                 regionLoader.save(regionManager);
                 player.sendMessage(ChatColor.YELLOW + "Region '" + id + "' updated.");
+            } catch (CircularInheritanceException e) {
+                player.sendMessage(ChatColor.RED + "Circular inheritance detected. The operation failed.");
             } catch (IOException e) {
                 player.sendMessage(ChatColor.RED + "Region database failed to save: "
                         + e.getMessage());
@@ -873,47 +935,74 @@ private boolean handleRegionCommand(Player player, String action, String[] args)
     
             ProtectedRegion region = regionManager.getRegion(id);
             AreaFlags flags = region.getFlags();
-            DefaultDomain domain = region.getOwners();
+            DefaultDomain owners = region.getOwners();
+            DefaultDomain members = region.getMembers();
             
-            player.sendMessage(ChatColor.YELLOW + "Region ID: " + id);
+            player.sendMessage(ChatColor.YELLOW + "Region: " + id
-            player.sendMessage(ChatColor.GRAY + "Type: " + region.getClass().getCanonicalName());
+                    + ChatColor.GRAY + " (type: " + region.getTypeName() + ")");
-            player.sendMessage(ChatColor.GRAY + "Priority: " + region.getPriority());
+            player.sendMessage(ChatColor.BLUE + "Priority: " + region.getPriority());
-            player.sendMessage(ChatColor.BLUE + "Build: " + flags.allowBuild.name());
-            player.sendMessage(ChatColor.BLUE + "PvP: " + flags.allowPvP.name());
-            player.sendMessage(ChatColor.BLUE + "TNT: " + flags.allowTNT.name());
-            player.sendMessage(ChatColor.BLUE + "Lighter: " + flags.allowLighter.name());
-            player.sendMessage(ChatColor.LIGHT_PURPLE + "Players: " + domain.toPlayersString());
-            player.sendMessage(ChatColor.LIGHT_PURPLE + "Groups: " + domain.toGroupsString());
             
+            StringBuilder s = new StringBuilder();
+            for (Map.Entry<String, State> entry : flags.entrySet()) {
+                if (s.length() > 0) {
+                    s.append(", ");
+                }
+                
+                if (entry.getValue() == State.ALLOW) {
+                    s.append("+");
+                    s.append(AreaFlags.getFlagName(entry.getKey()));
+                } else if (entry.getValue() == State.DENY) {
+                    s.append("-");
+                    s.append(AreaFlags.getFlagName(entry.getKey()));
+                }
+            }
+            
+            player.sendMessage(ChatColor.BLUE + "Flags: " + s.toString());
+            player.sendMessage(ChatColor.BLUE + "Parent: "
+                    + (region.getParent() == null ? "(none)" : region.getParent().getId()));
+            player.sendMessage(ChatColor.LIGHT_PURPLE + "Owners: "
+                    + owners.toUserFriendlyString());
+            player.sendMessage(ChatColor.LIGHT_PURPLE + "Members: "
+                    + members.toUserFriendlyString());
             return true;
         }
 
-        if (action.equalsIgnoreCase("addowner")) {
+        if (action.equalsIgnoreCase("addowner") || action.equalsIgnoreCase("addmember")) {
             if (!hasPermission(player, "/regionclaim")) {
                 checkRegionPermission(player, "/regiondefine");
             }
-            checkArgs(args, 2, -1, "/region addowner <id> [owner1 [owner2 [owners...]]]");
+            checkArgs(args, 2, -1, "/region add[member|owner] <id> [player1 [group1 [players/groups...]]]");
-    
+            
-            try {
+            boolean isOwner = action.equalsIgnoreCase("addowner");
-                String id = args[0].toLowerCase();
+
-                if (!regionManager.hasRegion(id)) {
+            String id = args[0].toLowerCase();
-                    player.sendMessage(ChatColor.RED + "A region with ID '"
+            if (!regionManager.hasRegion(id)) {
-                            + id + "' doesn't exist.");
+                player.sendMessage(ChatColor.RED + "A region with ID '"
-                    return true;
+                        + id + "' doesn't exist.");
-                }
+                return true;
-                
+            }
-                ProtectedRegion existing = regionManager.getRegion(id);
+            
-                
+            ProtectedRegion existing = regionManager.getRegion(id);
-                if (!canUseRegionCommand(player, "/regiondefine")
+            
-                        && !existing.getOwners().contains(wrapPlayer(player))) {
+            if (!canUseRegionCommand(player, "/regiondefine")
-                    player.sendMessage(ChatColor.RED + "You don't own this region.");
+                    && !existing.isOwner(wrapPlayer(player))) {
-                    return true;
+                player.sendMessage(ChatColor.RED + "You don't own this region.");
-                }
+                return true;
-                
+            }
+            
+            if (isOwner) {
                 addToDomain(existing.getOwners(), args, 1);
-                
+            } else {
+                addToDomain(existing.getMembers(), args, 1);
+            }
+
+            try {
                 regionLoader.save(regionManager);
                 player.sendMessage(ChatColor.YELLOW + "Region updated!");
+                player.sendMessage(ChatColor.GRAY + "Current owners: "
+                        + existing.getOwners().toUserFriendlyString());
+                player.sendMessage(ChatColor.GRAY + "Current members: "
+                        + existing.getMembers().toUserFriendlyString());
             } catch (IOException e) {
                 player.sendMessage(ChatColor.RED + "Region database failed to save: "
                         + e.getMessage());
@@ -922,32 +1011,42 @@ private boolean handleRegionCommand(Player player, String action, String[] args)
             return true;
         }
 
-        if (action.equalsIgnoreCase("removeowner")) {
+        if (action.equalsIgnoreCase("removeowner") || action.equalsIgnoreCase("removemember")) {
             if (!hasPermission(player, "/regionclaim")) {
                 checkRegionPermission(player, "/regiondefine");
             }
             checkArgs(args, 2, -1, "/region removeowner <id> [owner1 [owner2 [owners...]]]");
-    
+            
-            try {
+            boolean isOwner = action.equalsIgnoreCase("removeowner");
-                String id = args[0].toLowerCase();
+            
-                if (!regionManager.hasRegion(id)) {
+            String id = args[0].toLowerCase();
-                    player.sendMessage(ChatColor.RED + "A region with ID '"
+            if (!regionManager.hasRegion(id)) {
-                            + id + "' doesn't exist.");
+                player.sendMessage(ChatColor.RED + "A region with ID '"
-                    return true;
+                        + id + "' doesn't exist.");
-                }
+                return true;
-                
+            }
-                ProtectedRegion existing = regionManager.getRegion(id);
+            
-                
+            ProtectedRegion existing = regionManager.getRegion(id);
-                if (!canUseRegionCommand(player, "/regiondefine")
+            
-                        && !existing.getOwners().contains(wrapPlayer(player))) {
+            if (!canUseRegionCommand(player, "/regiondefine")
-                    player.sendMessage(ChatColor.RED + "You don't own this region.");
+                    && !existing.isOwner(wrapPlayer(player))) {
-                    return true;
+                player.sendMessage(ChatColor.RED + "You don't own this region.");
-                }
+                return true;
-                
+            }
+
+            if (isOwner) {
                 removeFromDomain(existing.getOwners(), args, 1);
+            } else {
+                removeFromDomain(existing.getMembers(), args, 1);
+            }
                 
+            try {
                 regionLoader.save(regionManager);
                 player.sendMessage(ChatColor.YELLOW + "Region updated!");
+                player.sendMessage(ChatColor.GRAY + "Current owners: "
+                        + existing.getOwners().toUserFriendlyString());
+                player.sendMessage(ChatColor.GRAY + "Current members: "
+                        + existing.getMembers().toUserFriendlyString());
             } catch (IOException e) {
                 player.sendMessage(ChatColor.RED + "Region database failed to save: "
                         + e.getMessage());
@@ -1013,7 +1112,7 @@ private boolean handleRegionCommand(Player player, String action, String[] args)
                 ProtectedRegion existing = regionManager.getRegion(id);
                 
                 if (!canUseRegionCommand(player, "/regiondelete")
-                        && !existing.getOwners().contains(wrapPlayer(player))) {
+                        && !existing.isOwner(wrapPlayer(player))) {
                     player.sendMessage(ChatColor.RED + "You don't own this region.");
                     return true;
                 }
@@ -1229,12 +1328,21 @@ BukkitPlayer wrapPlayer(Player player) {
         return new BukkitPlayer(this, player);
     }
 
+    /**
+     * Thrown when command handling has raised an exception.
+     * 
+     * @author sk89q
+     */
+    private static class CommandHandlingException extends Exception {
+        private static final long serialVersionUID = 7912130636812036780L;
+    }
+
     /**
      * Thrown when a player has insufficient permissions.
      * 
      * @author sk89q
      */
-    private static class InsufficientPermissionsException extends Exception {
+    private static class InsufficientPermissionsException extends CommandHandlingException {
         private static final long serialVersionUID = 9087662707619954750L;
     }
     
@@ -1243,7 +1351,7 @@ private static class InsufficientPermissionsException extends Exception {
      * 
      * @author sk89q
      */
-    private static class InsufficientArgumentsException extends Exception {
+    private static class InsufficientArgumentsException extends CommandHandlingException {
         private static final long serialVersionUID = 4153597953889773788L;
         private final String help;
         

src/com/sk89q/worldguard/domains/DefaultDomain.java

@@ -98,6 +98,7 @@ public String toPlayersString() {
     public String toGroupsString() {
         StringBuilder str = new StringBuilder();
         for (Iterator<String> it = groups.iterator(); it.hasNext(); ) {
+            str.append("*");
             str.append(it.next());
             if (it.hasNext()) {
                 str.append(", ");
@@ -105,4 +106,21 @@ public String toGroupsString() {
         }
         return str.toString();
     }
+    
+    public String toUserFriendlyString() {
+        StringBuilder str = new StringBuilder();
+        if (players.size() > 0) {
+            str.append(toPlayersString());
+        }
+        
+        if (groups.size() > 0) {
+            if (str.length() > 0) {
+                str.append("; ");
+            }
+            
+            str.append(toGroupsString());
+        }
+        
+        return str.toString();
+    }
 }

src/com/sk89q/worldguard/protection/ApplicableRegionSet.java

@@ -19,6 +19,8 @@
 
 package com.sk89q.worldguard.protection;
 
+import java.util.HashSet;
+import java.util.Set;
 import java.util.SortedMap;
 import com.sk89q.worldedit.Vector;
 import com.sk89q.worldguard.LocalPlayer;
@@ -30,175 +32,139 @@
  * @author sk89q
  */
 public class ApplicableRegionSet {
+    private GlobalFlags global;
     private Vector pt;
     private SortedMap<String,ProtectedRegion> regions;
     
-    public ApplicableRegionSet(Vector pt, SortedMap<String,ProtectedRegion> regions) {
+    /**
+     * Construct the object.
+     * 
+     * @param pt
+     * @param regions
+     * @param global
+     */
+    public ApplicableRegionSet(Vector pt, SortedMap<String,ProtectedRegion> regions,
+            GlobalFlags global) {
         this.pt = pt;
         this.regions = regions;
+        this.global = global;
     }
     
+    /**
+     * Checks if a player can build in an area.
+     * 
+     * @param player
+     * @return
+     */
     public boolean canBuild(LocalPlayer player) {
+        return isFlagAllowed(AreaFlags.FLAG_BUILD, global.canBuild, player);
+    }
+    
+    /**
+     * Checks a flag.
+     * 
+     * @param player
+     * @return
+     */
+    public boolean allowsFlag(String flag) {
+        return isFlagAllowed(flag, true, null);
+    }
+    
+    /**
+     * Checks to see if a flag is permitted.
+     * 
+     * @param def default state if there are no regions defined
+     * @param player null to not check owners and members
+     * @return
+     */
+    private boolean isFlagAllowed(String flag, boolean def, LocalPlayer player) {
         boolean found = false;
+        boolean allowed = false; // Used for ALLOW override
         int lastPriority = 0;
+
+        // The algorithm is as follows:
+        // While iterating through the list of regions, if an entry disallows
+        // the flag, then put it into the needsClear set. If an entry allows
+        // the flag and it has a parent, then its parent is put into hasCleared.
+        // In the situation that the child is reached before the parent, upon
+        // the parent being reached, even if the parent disallows, because the
+        // parent will be in hasCleared, permission will be allowed. In the
+        // other case, where the parent is reached first, if it does not allow
+        // permissions, it will be placed into needsClear. If a child of
+        // the parent is reached later, the parent will be removed from
+        // needsClear. At the end, if needsClear is not empty, that means that
+        // permission should not be given. If a parent has multiple children
+        // and one child does not allow permissions, then it will be placed into
+        // needsClear just like as if was a parent.
+        
+        Set<ProtectedRegion> needsClear = new HashSet<ProtectedRegion>();
+        Set<ProtectedRegion> hasCleared = new HashSet<ProtectedRegion>();
         
         for (ProtectedRegion region : regions.values()) {
-            if (region.getFlags().allowBuild == State.ALLOW) continue;
+            // Ignore non-build regions
-            if (!region.contains(pt)) continue;
+            if (player != null && region.getFlags().get(AreaFlags.FLAG_PASSTHROUGH) == State.ALLOW) {
-            
+                continue;
-            // Ignore lower priority regions
-            if (found && region.getPriority() < lastPriority) {
-                break;
             }
             
-            if (!region.getOwners().contains(player)) {
+            // Forget about regions that are not covered
+            if (!region.contains(pt)) {
+                continue;
+            }
+            
+            // Allow DENY to override everything
+            if (region.getFlags().get(flag) == State.DENY) {
                 return false;
             }
             
-            found = true;
+            // Forget about regions that allow it, although make sure the
-            lastPriority = region.getPriority();
+            // default state is now to allow
-        }
+            if (region.getFlags().get(flag) == State.ALLOW) {
-        
+                allowed = true;
-        return true;
+                continue;
-    }
+            }
-    
-    public boolean allowsPvP() {
-        boolean found = false;
-        int lastPriority = 0;
-        
-        for (ProtectedRegion region : regions.values()) {
-            if (!region.contains(pt)) continue;
-            if (region.getFlags().allowPvP == State.DENY) return false;
             
             // Ignore lower priority regions
             if (found && region.getPriority() < lastPriority) {
                 break;
             }
             
-            found = true;
+            if (player != null) {
-            lastPriority = region.getPriority();
+                if (hasCleared.contains(region)) {
-        }
+                    // Already cleared, so do nothing
-        
+                } else {
-        return true;
+                    if (!region.isMember(player)) {
-    }
+                        needsClear.add(region);
-    
+                    } else {
-    public boolean allowsMobDamage() {
+                        // Need to clear all parents
-        boolean found = false;
+                        clearParents(needsClear, hasCleared, region);
-        int lastPriority = 0;
+                    }
-        
+                }
-        for (ProtectedRegion region : regions.values()) {
-            if (!region.contains(pt)) continue;
-            if (region.getFlags().allowMobDamage == State.DENY) return false;
-            
-            // Ignore lower priority regions
-            if (found && region.getPriority() < lastPriority) {
-                break;
             }
             
             found = true;
             lastPriority = region.getPriority();
         }
         
-        return true;
+        return found == false ? def : allowed || needsClear.size() == 0;
     }
     
-    public boolean allowsCreeperExplosions() {
+    /**
-        boolean found = false;
+     * Clear a region's parents for isFlagAllowed().
-        int lastPriority = 0;
+     * 
+     * @param needsClear
+     * @param hasCleared
+     * @param region
+     */
+    private void clearParents(Set<ProtectedRegion> needsClear,
+            Set<ProtectedRegion> hasCleared, ProtectedRegion region) {
+        ProtectedRegion parent = region.getParent();
         
-        for (ProtectedRegion region : regions.values()) {
+        while (parent != null) {
-            if (!region.contains(pt)) continue;
+            if (!needsClear.remove(parent)) {
-            if (region.getFlags().allowCreeperExplosions == State.DENY) return false;
+                hasCleared.add(parent);
-            
-            // Ignore lower priority regions
-            if (found && region.getPriority() < lastPriority) {
-                break;
             }
             
-            found = true;
+            parent = parent.getParent();
-            lastPriority = region.getPriority();
         }
-        
-        return true;
-    }
-    
-    public boolean allowsTNT() {
-        boolean found = false;
-        int lastPriority = 0;
-        
-        for (ProtectedRegion region : regions.values()) {
-            if (!region.contains(pt)) continue;
-            if (region.getFlags().allowTNT == State.DENY) return false;
-            
-            // Ignore lower priority regions
-            if (found && region.getPriority() < lastPriority) {
-                break;
-            }
-            
-            found = true;
-            lastPriority = region.getPriority();
-        }
-        
-        return true;
-    }
-    
-    public boolean allowsLighter() {
-        boolean found = false;
-        int lastPriority = 0;
-        
-        for (ProtectedRegion region : regions.values()) {
-            if (!region.contains(pt)) continue;
-            if (region.getFlags().allowLighter == State.DENY) return false;
-            
-            // Ignore lower priority regions
-            if (found && region.getPriority() < lastPriority) {
-                break;
-            }
-            
-            found = true;
-            lastPriority = region.getPriority();
-        }
-        
-        return true;
-    }
-    
-    public boolean allowsFireSpread() {
-        boolean found = false;
-        int lastPriority = 0;
-        
-        for (ProtectedRegion region : regions.values()) {
-            if (!region.contains(pt)) continue;
-            if (region.getFlags().allowFireSpread == State.DENY) return false;
-            
-            // Ignore lower priority regions
-            if (found && region.getPriority() < lastPriority) {
-                break;
-            }
-            
-            found = true;
-            lastPriority = region.getPriority();
-        }
-        
-        return true;
-    }
-    
-    public boolean allowsLavaFire() {
-        boolean found = false;
-        int lastPriority = 0;
-        
-        for (ProtectedRegion region : regions.values()) {
-            if (!region.contains(pt)) continue;
-            if (region.getFlags().allowLavaFire == State.DENY) return false;
-            
-            // Ignore lower priority regions
-            if (found && region.getPriority() < lastPriority) {
-                break;
-            }
-            
-            found = true;
-            lastPriority = region.getPriority();
-        }
-        
-        return true;
     }
 }

src/com/sk89q/worldguard/protection/AreaFlags.java

@@ -19,7 +19,12 @@
 
 package com.sk89q.worldguard.protection;
 
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+
 /**
+ * Holds the flags for a region.
  * 
  * @author sk89q
  */
@@ -30,14 +35,98 @@ public enum State {
         DENY,
     };
 
-    public State allowBuild = State.NONE;
+    public static final String FLAG_PASSTHROUGH = "z";
-    public State allowPvP = State.NONE;
+    public static final String FLAG_BUILD = "b";
-    public State allowMobDamage = State.NONE;
+    public static final String FLAG_PVP = "p";
-    public State allowCreeperExplosions = State.NONE;
+    public static final String FLAG_MOB_DAMAGE = "m";
-    public State allowTNT = State.NONE;
+    public static final String FLAG_CREEPER_EXPLOSION = "c";
-    public State allowLighter = State.NONE;
+    public static final String FLAG_TNT = "t";
-    public State allowFireSpread = State.NONE;
+    public static final String FLAG_LIGHTER = "l";
-    public State allowLavaFire = State.NONE;
+    public static final String FLAG_FIRE_SPREAD = "f";
+    public static final String FLAG_LAVA_FIRE = "F";
+    
+    /**
+     * Get the user-friendly name of a flag. If a name isn't known, then
+     * the flag is returned unchanged.
+     * 
+     * @param flag
+     * @return
+     */
+    public static String getFlagName(String flag) {
+        if (flag.equals(FLAG_PASSTHROUGH)) {
+            return "passthrough";
+        } else if (flag.equals(FLAG_BUILD)) {
+            return "build";
+        } else if (flag.equals(FLAG_PVP)) {
+            return "PvP";
+        } else if (flag.equals(FLAG_MOB_DAMAGE)) {
+            return "mob damage";
+        } else if (flag.equals(FLAG_CREEPER_EXPLOSION)) {
+            return "creeper explosion";
+        } else if (flag.equals(FLAG_TNT)) {
+            return "TNT";
+        } else if (flag.equals(FLAG_LIGHTER)) {
+            return "lighter";
+        } else if (flag.equals(FLAG_FIRE_SPREAD)) {
+            return "fire spread";
+        } else if (flag.equals(FLAG_LAVA_FIRE)) {
+            return "lava fire spread";
+        } else {
+            return flag;
+        }
+    }
+    
+    /**
+     * Gets a flag from an alias. May return null.
+     * 
+     * @param name
+     * @return
+     */
+    public static String fromAlias(String name) {
+        if (name.equalsIgnoreCase("passthrough")) {
+            return FLAG_PASSTHROUGH;
+        } else if (name.equalsIgnoreCase("build")) {
+            return FLAG_BUILD;
+        } else if (name.equalsIgnoreCase("pvp")) {
+            return FLAG_PVP;
+        } else if (name.equalsIgnoreCase("mobdamage")) {
+            return FLAG_MOB_DAMAGE;
+        } else if (name.equalsIgnoreCase("creeper")) {
+            return FLAG_CREEPER_EXPLOSION;
+        } else if (name.equalsIgnoreCase("tnt")) {
+            return FLAG_TNT;
+        } else if (name.equalsIgnoreCase("lighter")) {
+            return FLAG_LIGHTER;
+        } else if (name.equalsIgnoreCase("firespread")) {
+            return FLAG_FIRE_SPREAD;
+        } else if (name.equalsIgnoreCase("lavafirespread")) {
+            return FLAG_LAVA_FIRE;
+        } else {
+            return null;
+        }
+    }
+    
+    private Map<String, State> states = new HashMap<String, State>();
+    
+    public State get(String flag) {
+        State state = states.get(flag);
+        if (state == null) {
+            return State.NONE;
+        }
+        return state;
+    }
+    
+    public void set(String flag, State state) {
+        if (state == State.NONE) {
+            states.remove(flag);
+        } else {
+            states.put(flag, state);
+        }
+    }
+    
+    public Set<Map.Entry<String, State>> entrySet() {
+        return states.entrySet();
+    }
     
     @Override
     public boolean equals(Object obj) {
@@ -46,14 +135,6 @@ public boolean equals(Object obj) {
         }
         
         AreaFlags other = (AreaFlags)obj;
-        
+        return other.states.equals(this);
-        return other.allowBuild == allowBuild
-                && other.allowPvP == allowPvP
-                && other.allowMobDamage == allowMobDamage
-                && other.allowCreeperExplosions == allowCreeperExplosions
-                && other.allowTNT == allowTNT
-                && other.allowLighter == allowLighter
-                && other.allowFireSpread == allowFireSpread
-                && other.allowLavaFire == allowLavaFire;
     }
 }

src/com/sk89q/worldguard/protection/CSVDatabase.java

@@ -20,6 +20,7 @@
 package com.sk89q.worldguard.protection;
 
 import java.util.HashMap;
+import java.util.LinkedHashMap;
 import java.util.Map;
 import java.util.logging.Logger;
 import java.util.regex.Matcher;
@@ -31,6 +32,8 @@
 import com.sk89q.worldedit.Vector;
 import com.sk89q.worldguard.domains.DefaultDomain;
 import com.sk89q.worldguard.protection.AreaFlags.State;
+import com.sk89q.worldguard.protection.ProtectedRegion.CircularInheritanceException;
+import com.sk89q.worldguard.util.ArrayReader;
 
 /**
  * Represents a protected area database that uses CSV files.
@@ -82,7 +85,7 @@ public void save() throws IOException {
                 
                 writer.writeNext(new String[] {
                         id,
-                        "cuboid",
+                        "cuboid.2",
                         String.valueOf(min.getBlockX()),
                         String.valueOf(min.getBlockY()),
                         String.valueOf(min.getBlockZ()),
@@ -90,9 +93,12 @@ public void save() throws IOException {
                         String.valueOf(max.getBlockY()),
                         String.valueOf(max.getBlockZ()),
                         String.valueOf(cuboid.getPriority()),
+                        cuboid.getParent() != null ? cuboid.getParent().getId() : "",
                         writeDomains(cuboid.getOwners()),
+                        writeDomains(cuboid.getMembers()),
                         writeFlags(cuboid.getFlags()),
-                        cuboid.getEnterMessage(),
+                        cuboid.getEnterMessage() != null ? cuboid.getEnterMessage() : "",
+                        cuboid.getLeaveMessage() != null ? cuboid.getLeaveMessage() : "",
                         });
             }
         } finally {
@@ -110,6 +116,8 @@ public void save() throws IOException {
     public void load() throws IOException {
         Map<String,ProtectedRegion> regions =
                 new HashMap<String,ProtectedRegion>();
+        Map<ProtectedRegion,String> parentSets =
+                new LinkedHashMap<ProtectedRegion, String>();
         
         CSVReader reader = new CSVReader(new FileReader(file));
         
@@ -117,16 +125,21 @@ public void load() throws IOException {
             String[] line;
             
             while ((line = reader.readNext()) != null) {
-                if (line.length >= 12) {
+                if (line.length < 2) {
-                    String type = line[1];
+                    logger.warning("Invalid region definition: " + line);
-                    if (!type.equalsIgnoreCase("cuboid")) {
+                    continue;
-                        logger.warning("Only cuboid region types are supported: "
+                }
-                                + line);
+                
-                        break;
+                String id = line[0].toLowerCase();
-                        
+                String type = line[1];
+                ArrayReader<String> entries = new ArrayReader<String>(line);
+                
+                if (type.equalsIgnoreCase("cuboid")) {
+                    if (line.length < 8) {
+                        logger.warning("Invalid region definition: " + line);
+                        continue;
                     }
                     
-                    String id = line[0];
                     Vector pt1 = new Vector(
                             Integer.parseInt(line[2]),
                             Integer.parseInt(line[3]),
@@ -139,19 +152,51 @@ public void load() throws IOException {
                     BlockVector min = Vector.getMinimum(pt1, pt2).toBlockVector();
                     BlockVector max = Vector.getMaximum(pt1, pt2).toBlockVector();
                     
-                    int priority = Integer.parseInt(line[8]);
+                    int priority = entries.get(8) == null ? 0 : Integer.parseInt(entries.get(8));
-                    String ownersData = line[9];
+                    String ownersData = entries.get(9);
-                    String flagsData = line[10];
+                    String flagsData = entries.get(10);
-                    String enterMessage = line[11];
+                    String enterMessage = nullEmptyString(entries.get(11));
                     
-                    ProtectedRegion region = new ProtectedCuboidRegion(min, max);
+                    ProtectedRegion region = new ProtectedCuboidRegion(id, min, max);
                     region.setPriority(priority);
+                    region.setFlags(parseFlags(flagsData));
                     region.setOwners(this.parseDomains(ownersData));
                     region.setEnterMessage(enterMessage);
-                    region.setFlags(parseFlags(flagsData));
                     regions.put(id, region);
-                } else {
+                } else if (type.equalsIgnoreCase("cuboid.2")) {
-                    logger.warning("Line is invalid: " + line);
+                    Vector pt1 = new Vector(
+                            Integer.parseInt(line[2]),
+                            Integer.parseInt(line[3]),
+                            Integer.parseInt(line[4]));
+                    Vector pt2 = new Vector(
+                            Integer.parseInt(line[5]),
+                            Integer.parseInt(line[6]),
+                            Integer.parseInt(line[7]));
+
+                    BlockVector min = Vector.getMinimum(pt1, pt2).toBlockVector();
+                    BlockVector max = Vector.getMaximum(pt1, pt2).toBlockVector();
+                    
+                    int priority = entries.get(8) == null ? 0 : Integer.parseInt(entries.get(8));
+                    String parentId = entries.get(9);
+                    String ownersData = entries.get(10);
+                    String membersData = entries.get(11);
+                    String flagsData = entries.get(12);
+                    String enterMessage = nullEmptyString(entries.get(13));
+                    String leaveMessage = nullEmptyString(entries.get(14));
+                    
+                    ProtectedRegion region = new ProtectedCuboidRegion(id, min, max);
+                    region.setPriority(priority);
+                    region.setFlags(parseFlags(flagsData));
+                    region.setOwners(this.parseDomains(ownersData));
+                    region.setMembers(this.parseDomains(membersData));
+                    region.setEnterMessage(enterMessage);
+                    region.setLeaveMessage(leaveMessage);
+                    regions.put(id, region);
+                    
+                    // Link children to parents later
+                    if (parentId.length() > 0) {
+                        parentSets.put(region, parentId);
+                    }
                 }
             }
         } finally {
@@ -161,6 +206,20 @@ public void load() throws IOException {
             }
         }
         
+        for (Map.Entry<ProtectedRegion, String> entry : parentSets.entrySet()) {
+            ProtectedRegion parent = regions.get(entry.getValue());
+            if (parent != null) {
+                try {
+                    entry.getKey().setParent(parent);
+                } catch (CircularInheritanceException e) {
+                    logger.warning("Circular inheritance detect with '"
+                            + entry.getValue() + "' detected as a parent");
+                }
+            } else {
+                logger.warning("Unknown region parent: " + entry.getValue());
+            }
+        }
+        
         this.regions = regions;
     }
 
@@ -191,6 +250,10 @@ public void save(RegionManager manager) throws IOException {
      * @return
      */
     private DefaultDomain parseDomains(String data) {
+        if (data == null) {
+            return new DefaultDomain();
+        }
+        
         DefaultDomain domain = new DefaultDomain();
         Pattern pattern = Pattern.compile("^([A-Za-z]):(.*)$");
         
@@ -230,33 +293,32 @@ private DefaultDomain parseDomains(String data) {
      * @return
      */
     private AreaFlags parseFlags(String data) {
+        if (data == null) {
+            return new AreaFlags();
+        }
+        
         AreaFlags flags = new AreaFlags();
         State curState = State.ALLOW;
         
         for (int i = 0; i < data.length(); i++) {
-            char flag = data.charAt(i);
+            char k = data.charAt(i);
-            if (flag == '+') {
+            if (k == '+') {
                 curState = State.ALLOW;
-            } else if (flag == '-') {
+            } else if (k == '-') {
                 curState = State.DENY;
-            } else if (flag == 'b') {
-                flags.allowBuild = curState;
-            } else if (flag == 'p') {
-                flags.allowPvP = curState;
-            } else if (flag == 'm') {
-                flags.allowMobDamage = curState;
-            } else if (flag == 'c') {
-                flags.allowCreeperExplosions = curState;
-            } else if (flag == 't') {
-                flags.allowTNT = curState;
-            } else if (flag == 'l') {
-                flags.allowLighter = curState;
-            } else if (flag == 'f') {
-                flags.allowFireSpread = curState;
-            } else if (flag == 'F') {
-                flags.allowLavaFire = curState;
             } else {
-                logger.warning("Unknown area flag/flag modifier: " + flag);
+                String flag;
+                if (k == '_') {
+                    if (i == data.length() - 1) {
+                        logger.warning("_ read ahead fail");
+                        break;
+                    }
+                    flag = "_" + data.charAt(i + 1);
+                    i++;
+                } else {
+                    flag = String.valueOf(k);
+                }
+                flags.set(flag, curState);
             }
         }
         
@@ -302,6 +364,22 @@ private String writeFlag(State state, String flag) {
         return "";
     }
     
+    /**
+     * Returns a null if a string is null or empty.
+     * 
+     * @param str
+     * @return
+     */
+    private String nullEmptyString(String str) {
+        if (str == null) {
+            return null;
+        } else if (str.length() == 0) {
+            return null;
+        } else {
+            return str;
+        }
+    }
+    
     /**
      * Used to write the list of flags.
      * 
@@ -310,14 +388,9 @@ private String writeFlag(State state, String flag) {
      */
     private String writeFlags(AreaFlags flags) {
         StringBuilder str = new StringBuilder();
-        str.append(writeFlag(flags.allowBuild, "b"));
+        for (Map.Entry<String, State> entry : flags.entrySet()) {
-        str.append(writeFlag(flags.allowPvP, "p"));
+            str.append(writeFlag(entry.getValue(), entry.getKey()));
-        str.append(writeFlag(flags.allowMobDamage, "m"));
+        }
-        str.append(writeFlag(flags.allowCreeperExplosions, "c"));
-        str.append(writeFlag(flags.allowTNT, "t"));
-        str.append(writeFlag(flags.allowLighter, "l"));
-        str.append(writeFlag(flags.allowFireSpread, "f"));
-        str.append(writeFlag(flags.allowLavaFire, "F"));
         return str.toString();
     }
 

src/com/sk89q/worldguard/protection/FlatRegionManager.java

@@ -39,12 +39,17 @@ public class FlatRegionManager implements RegionManager {
      * List of protected regions.
      */
     private SortedMap<String,ProtectedRegion> regions;
+    /**
+     * Global flags.
+     */
+    private GlobalFlags global;
     
     /**
      * Construct the manager.
      */
-    public FlatRegionManager() {
+    public FlatRegionManager(GlobalFlags global) {
         regions = new TreeMap<String,ProtectedRegion>();
+        this.global = global;
     }
     
     /**
@@ -71,17 +76,27 @@ public void setRegions(Map<String,ProtectedRegion> regions) {
      * @param id
      * @param region
      */
-    public void addRegion(String id, ProtectedRegion region) {
+    public void addRegion(ProtectedRegion region) {
-        regions.put(id, region);
+        regions.put(region.getId(), region);
     }
     
     /**
-     * Removes a region.
+     * Removes a region and its children.
      * 
      * @param id
      */
     public void removeRegion(String id) {
+        ProtectedRegion region = regions.get(id);
+        
         regions.remove(id);
+        
+        if (region != null) {
+            for (Map.Entry<String, ProtectedRegion> entry : regions.entrySet()) {
+                if (entry.getValue().getParent() == region) {
+                    removeRegion(entry.getKey());
+                }
+            }
+        }
     }
     
     /**
@@ -110,7 +125,7 @@ public ProtectedRegion getRegion(String id) {
      * @return
      */
     public ApplicableRegionSet getApplicableRegions(Vector pt) {
-        return new ApplicableRegionSet(pt, regions);
+        return new ApplicableRegionSet(pt, regions, global);
     }
     
     /**

src/com/sk89q/worldguard/protection/GlobalFlags.java

@@ -0,0 +1,29 @@
+// $Id$
+/*
+ * WorldGuard
+ * Copyright (C) 2010 sk89q <http://www.sk89q.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package com.sk89q.worldguard.protection;
+
+/**
+ * Used for default flags.
+ * 
+ * @author sk89q
+ */
+public class GlobalFlags {
+    public boolean canBuild = true;
+}

src/com/sk89q/worldguard/protection/ProtectedCuboidRegion.java

@@ -39,12 +39,13 @@ public class ProtectedCuboidRegion extends ProtectedRegion {
     /**
      * Construct a new instance of this cuboid region.
      *
+     * @param id
      * @param pos1
      * @param pos2
      * @param priority
      */
-    public ProtectedCuboidRegion(BlockVector min, BlockVector max) {
+    public ProtectedCuboidRegion(String id, BlockVector min, BlockVector max) {
-        super();
+        super(id);
         this.min = min;
         this.max = max;
     }
@@ -85,6 +86,9 @@ public void setMaximumPoint(BlockVector pt) {
         max = pt;
     }
 
+    /**
+     * Checks to see if a point is inside this region.
+     */
     @Override
     public boolean contains(Vector pt) {
         int x = pt.getBlockX();
@@ -94,4 +98,13 @@ public boolean contains(Vector pt) {
                 && y >= min.getBlockY() && y <= max.getBlockY()
                 && z >= min.getBlockZ() && z <= max.getBlockZ();
     }
+    
+    /**
+     * Return the type of region as a user-friendly name.
+     * 
+     * @return type of region
+     */
+    public String getTypeName() {
+        return "cuboid";
+    }
 }

src/com/sk89q/worldguard/protection/ProtectedRegion.java

@@ -21,6 +21,7 @@
 
 import com.sk89q.worldedit.BlockVector;
 import com.sk89q.worldedit.Vector;
+import com.sk89q.worldguard.LocalPlayer;
 import com.sk89q.worldguard.domains.DefaultDomain;
 
 /**
@@ -30,34 +31,52 @@
  */
 public abstract class ProtectedRegion implements Comparable<ProtectedRegion> {
     /**
-     * Area message.
+     * Holds the region's ID.
      */
-    private String enterMessage;
+    private String id;
-    /**
-     * List of owners.
-     */
-    private DefaultDomain owners = new DefaultDomain();
     /**
      * Priority.
      */
     private int priority = 0;
+    /**
+     * Parent region.
+     */
+    private ProtectedRegion parent;
+    /**
+     * List of owners.
+     */
+    private DefaultDomain owners = new DefaultDomain();
+    /**
+     * List of members.
+     */
+    private DefaultDomain members = new DefaultDomain();
     /**
      * Area flags.
      */
     private AreaFlags flags = new AreaFlags();
+    /**
+     * Area message.
+     */
+    private String enterMessage;
+    /**
+     * Area message.
+     */
+    private String leaveMessage;
 
     /**
      * Construct a new instance of this region.
      *
      * @param id
-     * @param priority
-     * @param owners
-     * @param enterMessage
      */
-    public ProtectedRegion() {
+    public ProtectedRegion(String id) {
-        this.priority = 0;
+        this.id = id;
-        this.owners = new DefaultDomain();
+    }
-        this.enterMessage = null;
+
+    /**
+     * @return the id
+     */
+    public String getId() {
+        return id;
     }
 
     /**
@@ -74,6 +93,41 @@ public void setPriority(int priority) {
         this.priority = priority;
     }
     
+    /**
+     * @return the parent
+     */
+    public ProtectedRegion getParent() {
+        return parent;
+    }
+
+    /**
+     * Set the parent. This checks to make sure that it will not result
+     * in circular inheritance.
+     * 
+     * @param parent the parent to set
+     * @throws CircularInheritanceException 
+     */
+    public void setParent(ProtectedRegion parent) throws CircularInheritanceException {
+        if (parent == null) {
+            this.parent = null;
+            return;
+        }
+        
+        if (parent == this) {
+            throw new CircularInheritanceException();
+        }
+        
+        ProtectedRegion p = parent.getParent();
+        while (p != null) {
+            if (p == this) {
+                throw new CircularInheritanceException();
+            }
+            p = p.getParent();
+        }
+        
+        this.parent = parent;
+    }
+
     /**
      * Se flags.
      * @param flags
@@ -95,6 +149,20 @@ public String getEnterMessage() {
     public void setEnterMessage(String enterMessage) {
         this.enterMessage = enterMessage;
     }
+    
+    /**
+     * @return the leaveMessage
+     */
+    public String getLeaveMessage() {
+        return leaveMessage;
+    }
+
+    /**
+     * @param leaveMessage the leaveMessage to set
+     */
+    public void setLeaveMessage(String leaveMessage) {
+        this.leaveMessage = leaveMessage;
+    }
 
     /**
      * @return the owners
@@ -110,6 +178,67 @@ public void setOwners(DefaultDomain owners) {
         this.owners = owners;
     }
 
+    /**
+     * @return the members
+     */
+    public DefaultDomain getMembers() {
+        return members;
+    }
+
+    /**
+     * @param owners the owners to set
+     */
+    public void setMembers(DefaultDomain members) {
+        this.members = members;
+    }
+    
+    /**
+     * Checks whether a player is an owner of region or any of its parents.
+     * 
+     * @param player
+     * @return
+     */
+    public boolean isOwner(LocalPlayer player) {
+        if (owners.contains(player)) {
+            return true;
+        }
+        
+        ProtectedRegion parent = getParent();
+        while (parent != null) {
+            if (parent.getOwners().contains(player)) {
+                return true;
+            }
+            
+            parent = parent.getParent();
+        }
+        
+        return false;
+    }
+    
+    /**
+     * Checks whether a player is a member of the region or any of its parents.
+     * 
+     * @param player
+     * @return
+     */
+    public boolean isMember(LocalPlayer player) {
+        if (owners.contains(player) || members.contains(player)) {
+            return true;
+        }
+        
+        ProtectedRegion parent = getParent();
+        while (parent != null) {
+            if (parent.getOwners().contains(player)
+                    || parent.getMembers().contains(player)) {
+                return true;
+            }
+            
+            parent = parent.getParent();
+        }
+        
+        return false;
+    }
+
     /**
      * Get flags.
      * 
@@ -143,6 +272,13 @@ public int compareTo(ProtectedRegion other) {
         }
     }
     
+    /**
+     * Return the type of region as a user-friendly, lowercase name.
+     * 
+     * @return type of region
+     */
+    public abstract String getTypeName();
+    
     /**
      * Checks if two region intersects.
      * 
@@ -172,4 +308,13 @@ public static boolean intersects(ProtectedRegion region1, ProtectedRegion region
             throw new UnsupportedIntersectionException();
         }
     }
+    
+    /**
+     * Thrown when setting a parent would create a circular inheritance
+     * situation.
+     * 
+     */
+    public static class CircularInheritanceException extends Exception {
+        private static final long serialVersionUID = 7479613488496776022L;
+    }
 }

src/com/sk89q/worldguard/protection/RegionManager.java

@@ -53,7 +53,7 @@ public interface RegionManager {
      * @param id
      * @param region
      */
-    public void addRegion(String id, ProtectedRegion region);
+    public void addRegion(ProtectedRegion region);
     
     /**
      * Return whether a region exists by an ID.
@@ -71,7 +71,7 @@ public interface RegionManager {
     public ProtectedRegion getRegion(String id);
     
     /**
-     * Removes a region.
+     * Removes a region, including inheriting children.
      * 
      * @param id
      */

src/com/sk89q/worldguard/util/ArrayReader.java

@@ -0,0 +1,44 @@
+// $Id$
+/*
+ * WorldGuard
+ * Copyright (C) 2010 sk89q <http://www.sk89q.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package com.sk89q.worldguard.util;
+
+public class ArrayReader<T> {
+    private T[] arr;
+    
+    public ArrayReader(T[] arr) {
+        this.arr = arr;
+    }
+    
+    public T get(int index) {
+        if (arr.length > index) {
+            return arr[index];
+        } else {
+            return null;
+        }
+    }
+    
+    public T get(int index, T def) {
+        if (arr.length > index) {
+            return arr[index];
+        } else {
+            return def;
+        }
+    }
+}

tests/com/sk89q/worldguard/protection/ApplicableRegionSetTest.java

@@ -26,17 +26,22 @@
 import com.sk89q.worldedit.Vector;
 import com.sk89q.worldguard.TestPlayer;
 import com.sk89q.worldguard.domains.DefaultDomain;
+import com.sk89q.worldguard.protection.AreaFlags.State;
 
 public class ApplicableRegionSetTest {
     static String COURTYARD_ID = "courtyard";
     static String FOUNTAIN_ID = "fountain";
+    static String NO_FIRE_ID = "nofire";
     static String MEMBER_GROUP = "member";
     static String COURTYARD_GROUP = "courtyard";
 
     Vector inFountain = new Vector(2, 2, 2);
     Vector inCourtyard = new Vector(7, 7, 7);
     Vector outside = new Vector(15, 15, 15);
+    Vector inNoFire = new Vector(150, 150, 150);
     RegionManager manager;
+    ProtectedRegion courtyard;
+    ProtectedRegion fountain;
     TestPlayer player1;
     TestPlayer player2;
 
@@ -47,6 +52,7 @@ public void setUp() throws Exception {
         setUpPlayers();
         setUpCourtyardRegion();
         setUpFountainRegion();
+        setUpNoFireRegion();
     }
     
     void setUpPlayers() {
@@ -62,24 +68,41 @@ void setUpCourtyardRegion() {
         DefaultDomain domain = new DefaultDomain();
         domain.addGroup(COURTYARD_GROUP);
         
-        ProtectedRegion region = new ProtectedCuboidRegion(
+        ProtectedRegion region = new ProtectedCuboidRegion(COURTYARD_ID,
                 new BlockVector(0, 0, 0), new BlockVector(10, 10, 10));
         AreaFlags flags = new AreaFlags();
-        flags.allowBuild = AreaFlags.State.NONE;
+        flags.set(AreaFlags.FLAG_BUILD, State.NONE);
-        flags.allowFireSpread = AreaFlags.State.ALLOW;
+        flags.set(AreaFlags.FLAG_FIRE_SPREAD, State.ALLOW);
         region.setFlags(flags);
         region.setOwners(domain);
-        manager.addRegion(COURTYARD_ID, region);
+        manager.addRegion(region);
+        
+        courtyard = region;
     }
     
-    void setUpFountainRegion() {
+    void setUpFountainRegion() throws Exception {
-        ProtectedRegion region = new ProtectedCuboidRegion(
+        DefaultDomain domain = new DefaultDomain();
+        domain.addGroup(MEMBER_GROUP);
+        
+        ProtectedRegion region = new ProtectedCuboidRegion(FOUNTAIN_ID,
                 new BlockVector(0, 0, 0), new BlockVector(5, 5, 5));
         AreaFlags flags = new AreaFlags();
-        flags.allowBuild = AreaFlags.State.ALLOW;
+        flags.set(AreaFlags.FLAG_FIRE_SPREAD, State.DENY);
-        flags.allowFireSpread = AreaFlags.State.DENY;
         region.setFlags(flags);
-        manager.addRegion(FOUNTAIN_ID, region);
+        region.setMembers(domain);
+        manager.addRegion(region);
+
+        fountain = region;
+        fountain.setParent(courtyard);
+    }
+    
+    void setUpNoFireRegion() throws Exception {
+        ProtectedRegion region = new ProtectedCuboidRegion(NO_FIRE_ID,
+                new BlockVector(100, 100, 100), new BlockVector(200, 200, 200));
+        AreaFlags flags = new AreaFlags();
+        flags.set(AreaFlags.FLAG_FIRE_SPREAD, State.DENY);
+        region.setFlags(flags);
+        manager.addRegion(region);
     }
     
     @Test
@@ -88,13 +111,17 @@ public void testNonBuildFlag() {
         
         // Outside
         appl = manager.getApplicableRegions(outside);
-        assertTrue(appl.allowsFireSpread());
+        assertTrue(appl.allowsFlag(AreaFlags.FLAG_FIRE_SPREAD));
         // Inside courtyard
         appl = manager.getApplicableRegions(inCourtyard);
-        assertTrue(appl.allowsFireSpread());
+        assertTrue(appl.allowsFlag(AreaFlags.FLAG_FIRE_SPREAD));
         // Inside fountain
         appl = manager.getApplicableRegions(inFountain);
-        assertFalse(appl.allowsFireSpread());
+        assertFalse(appl.allowsFlag(AreaFlags.FLAG_FIRE_SPREAD));
+
+        // Inside no fire zone
+        appl = manager.getApplicableRegions(inNoFire);
+        assertFalse(appl.allowsFlag(AreaFlags.FLAG_FIRE_SPREAD));
     }
     
     @Test

tests/com/sk89q/worldguard/protection/CSVDatabaseTest.java

@@ -28,6 +28,7 @@
 import static org.junit.Assert.*;
 import com.sk89q.worldedit.BlockVector;
 import com.sk89q.worldguard.domains.DefaultDomain;
+import com.sk89q.worldguard.protection.AreaFlags.State;
 
 public class CSVDatabaseTest {
     @Before
@@ -63,9 +64,9 @@ public void testLoadSave() throws Exception {
     
     private void checkTestRegion1(ProtectedRegion region) {
         AreaFlags flags = new AreaFlags();
-        flags.allowFireSpread = AreaFlags.State.ALLOW;
+        flags.set(AreaFlags.FLAG_FIRE_SPREAD, State.ALLOW);
-        flags.allowPvP = AreaFlags.State.DENY;
+        flags.set(AreaFlags.FLAG_PVP, State.DENY);
-        flags.allowLighter = AreaFlags.State.DENY;
+        flags.set(AreaFlags.FLAG_LIGHTER, State.DENY);
         region.setFlags(flags);
         
         assertEquals(region.getFlags(), flags);
@@ -75,12 +76,12 @@ private ProtectedRegion getTestRegion1() {
         BlockVector min = new BlockVector(1, 2, 3);
         BlockVector max = new BlockVector(4, 5, 6);
         
-        ProtectedRegion region = new ProtectedCuboidRegion(min, max);
+        ProtectedRegion region = new ProtectedCuboidRegion("test2", min, max);
         
         AreaFlags flags = new AreaFlags();
-        flags.allowFireSpread = AreaFlags.State.ALLOW;
+        flags.set(AreaFlags.FLAG_FIRE_SPREAD, State.ALLOW);
-        flags.allowPvP = AreaFlags.State.DENY;
+        flags.set(AreaFlags.FLAG_PVP, State.DENY);
-        flags.allowLighter = AreaFlags.State.DENY;
+        flags.set(AreaFlags.FLAG_LIGHTER, State.DENY);
         region.setFlags(flags);
         
         DefaultDomain domain = new DefaultDomain();
@@ -101,12 +102,12 @@ private ProtectedRegion getTestRegion2() {
         BlockVector min = new BlockVector(7, 8, 9);
         BlockVector max = new BlockVector(10, 11, 12);
         
-        ProtectedRegion region = new ProtectedCuboidRegion(min, max);
+        ProtectedRegion region = new ProtectedCuboidRegion("test2", min, max);
         
         AreaFlags flags = new AreaFlags();
-        flags.allowFireSpread = AreaFlags.State.DENY;
+        flags.set(AreaFlags.FLAG_FIRE_SPREAD, State.ALLOW);
-        flags.allowPvP = AreaFlags.State.ALLOW;
+        flags.set(AreaFlags.FLAG_PVP, State.ALLOW);
-        flags.allowMobDamage = AreaFlags.State.DENY;
+        flags.set(AreaFlags.FLAG_LIGHTER, State.DENY);
         region.setFlags(flags);
         
         DefaultDomain domain = new DefaultDomain();